svc@well.UUCP (Leonard Rosenthol) (04/25/89)
In article <1363@bucket.UUCP>, martyl@bucket.UUCP (Marty Lee) writes: > > I just got a Microcom QX modem. Everything works fine until I use Xmodem, > Kermit or do a Binary transfer. In these modes Xon/Xoff cannot be used be > cause if there happens to be the binary code for a control-S or control-Q > the transfer gets screwed up. So, I turned off Xon/Xoff in the modem. > Now I have two choices no handshake....and let the mac or the modem overflow. > Or I can use hardware handshake (CTS/RTS)..... > It looks like I should use the hardware handshake. BUT....the Mac > does not support the RTS/CTS handshake leads. The Mac only supports > DTR/DTS. > THIS IS NOT TRUE!! Assuming that you have at least a Mac Plus (the older style DB-9 ports do not have the right lines) and a specially wired cable (so that lines match up) you can most certainly do RTS/CTS (hardware) handshaking on the Mac. In fact, I have a RTS/CTS wired cable between my Mac and my Telebit T2000, and boy does it make doing YMODEM-G and ZMODEM transfers much better!! MicroPhone II, Red Ryder 10.x and (I believe) Smartcom II 3.1 all offer a hardware handshake option and they do it (I assume) by making the DOCUMENTED call to the serial driver to tell it so - SerHShake (see IM II pg 251). -- +--------------------------------------------------+ Leonard Rosenthol | GEnie : MACgician Lazerware, inc. | MacNet: MACgician UUCP: svc@well.UUCP | ALink : D0025